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<TITLE>Astroavibroser help</TITLE>
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<H1>Astroavibrowser 0.4 help</H1>

<H2>Menus</H2>

<H3>File Menu</H3>

<H4>Open...</H4>
<P>Opens a video file in any ffmpeg/libav supported
format.
<P>You may also open a file using a command line parameter.
<H4>Save...</H4>
<P>Saves the frames you selected using either the
BMP or the AVI output, depending on the output and the
codec you choosed.
<H4>Save &lt;plan&gt;...<></H4>
<P>Saves the frames you selected like the usual 'save' menu,
but only stores one of the color plans.
<UL>
<LI>Luminance : frames are converted to grey level pictures
<LI>R plan : red frames components converted to grey level pictures
<LI>G plan : green frames components converted to grey level pictures
<LI>B plan : blue frames components converted to grey level pictures
</UL>
<H4>Build &lt;method&gt; &lt;colors&gt;</H4>
<P>Saves the selected frames applying the selected method, either like
a grey level picture or an RGB picture. Pictures are saved as BMP
files.
<H5>method</H5>
<UL>
<LI>sum : summing pixels of each frames
<LI>max : just keep the bightest pixel values of all frames
<LI>mean : resulting pixel is the mean of all the selected frames pixels
<LI>median : resulting pixel is the mean of all the selected frames pixels
</UL>
<H5>colors</H5>
<UL>
<LI>(mono) : luminance only, 8bits picture
<LI>(rgb) : RGB color picture
</UL>
<H4>Quit</H4>
<P>Quit astroavibrowser

<H3>Menu Input</H3>
<H4>Properties...</H4>
<P>Gives the input video properties
<H4>Bayer Mode</H4>
<P>If your input file is a raw capture from a camera using a Bayer pattern,
select the Bayer pattern order to apply for de-Bayering. Astroavibrowser
uses a bilinear algorithm to de-bayer raw frames.

<H3>Menu Output</H3>
<H4>BMP Sequence</H4>
<P>Each frame is stored in a BMP numbered file.
<H4>Avi movie</H4>
<P>
<UL>
<LI>Raw : uncompressed raw
<LI>Lossless Huffyuv : Huffyuv lossless codec
</UL>

<H3>Menu Settings</H3>
<H4>Force RGB24 output</H4>
<P>Some software doesn't support the AVI raw 8 bits format (Y800). Using this
option, you may force every raw output to RGB24.

<H3>Menu Help</H3>
<H4>Help...</H4>
<P>This help file.
<H4>About...</H4>
<P>About astroavibrowser.

<H2>Main window</H2>
<P>The current frame is diplayed on the right.
<H3>The frame list</H3>
<P>On the left, you can check or uncheck each frame.
<P>The first en the second buttons checks or unchecks all the frame. The third
button inverts the actual selection.
<P>The 'Auto Selection' will automaticaly select the best frames based on their
sharpness. The 'keep' number indicates the percent of frames you want. 80% means
1/5 of the frames (the ugliest) will be dropped. This method works better on
deep sky imaging than on planetary imaging.
<H3>The histogram</H3>
<P>Usualy, a sharp histogram means a sharper image. You can compare the histogram
of each frame with the mean histogram of the wall sequence (the red line).

<H2>Notes</H2>
<UL>
<LI>In raw format, 'avi' files should be stored 
upside-down, using a negative height. 'gstreamer' 0.10
doesn't follows this specification. In order to be
compatible with 'gstreamer', astrovaibrowser stores
raw movies upside-up, with a positive height. Depending
on the software you use, your output video may be verticaly
fliped.
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